Novel multi-monotube semiconductor laser unit optical fiber coupling module

Abstract

The invention discloses a novel multi-monotube semiconductor laser unit optical fiber coupling module. The optical fiber coupling module comprises a base plate and two stepped heat sink sets arranged at the two ends, in the first direction, of the base plate. Each stepped heat sink set is provided with a plurality of step surfaces which become higher in sequence from the middle of the base plate to the two ends in the first direction. Two semiconductor laser units are oppositely arranged on each step surface and are arranged in the second direction of the base plate. The second direction is perpendicular to the first direction. A tool point right-angle reflector is arranged between every two semiconductor laser units. Light beams emitted by the semiconductor laser units are combined at the position of each tool point right-angle reflector. Reflectors are arranged between the two stepped heat sink sets and correspond to the tool point right-angle reflectors in position, each reflector is provided with two reflection surfaces to be used for combination of semiconductor laser beams on the two stepped heat sink sets in the fast-axis direction, and a beam expander and a focus lens are sequentially arranged on each reflector in the outlet light beam direction. By the adoption of the optical fiber coupling module, two-dimensional arrangement of laser beams can be achieved, and optical fiber coupling output power can be improved.

Description

technical field [0001] The invention relates to the technical field of semiconductor laser devices, in particular to a novel multi-single-tube semiconductor laser fiber coupling module. Background technique [0002] High-power semiconductor lasers have the advantages of small size, high plug conversion efficiency, and long service life. They are widely used in material processing, laser pumping, and national defense security. At present, the problem of high-power semiconductor lasers and complete sets of equipment has restricted the rapid development of my country's laser technology, and products in this field are completely dependent on imports. [0003] In order to obtain high-power, high-brightness semiconductor laser fiber coupling output, a variety of semiconductor laser beam combining and fiber coupling schemes have been proposed at home and abroad using technologies such as spatial beam combining, polarization beam combining, and wavelength beam combining. For exampl...

AI Technical Summary

Problems solved by technology

On the one hand, this design reduces the fiber coupling output power due to the limitation of fiber size and numerical aperture; on the other hand, in order to obtain a larger output power, the aperture of the coupling focusing mirror is increased, resulting in an excessively large diameter of the coupling focusing mirror. , increasing the difficulty of designing and manufacturing the focusing lens

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